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//========================================================================
//
// Outline.cc
//
// Copyright 2002-2003 Glyph & Cog, LLC
//
//========================================================================
//========================================================================
//
// Modified under the Poppler project - http://poppler.freedesktop.org
//
// All changes made under the Poppler project to this file are licensed
// under GPL version 2 or later
//
// Copyright (C) 2005 Marco Pesenti Gritti <mpg@redhat.com>
// Copyright (C) 2008, 2016-2019 Albert Astals Cid <aacid@kde.org>
// Copyright (C) 2009 Nick Jones <nick.jones@network-box.com>
// Copyright (C) 2016 Jason Crain <jason@aquaticape.us>
// Copyright (C) 2017 Adrian Johnson <ajohnson@redneon.com>
// Copyright (C) 2018 Klarälvdalens Datakonsult AB, a KDAB Group company, <info@kdab.com>. Work sponsored by the LiMux project of the city of Munich
// Copyright (C) 2018 Adam Reichold <adam.reichold@t-online.de>
//
// To see a description of the changes please see the Changelog file that
// came with your tarball or type make ChangeLog if you are building from git
//
//========================================================================
#include <config.h>
#include "goo/gmem.h"
#include "goo/GooString.h"
#include "XRef.h"
#include "Link.h"
#include "PDFDocEncoding.h"
#include "Outline.h"
#include "UTF.h"
//------------------------------------------------------------------------
Outline::Outline(const Object *outlineObj, XRef *xref) {
items = nullptr;
if (!outlineObj->isDict()) {
return;
}
const Object &first = outlineObj->dictLookupNF("First");
items = OutlineItem::readItemList(nullptr, &first, xref);
}
Outline::~Outline() {
if (items) {
for (auto entry : *items) {
delete entry;
}
delete items;
}
}
//------------------------------------------------------------------------
OutlineItem::OutlineItem(const Dict *dict, int refNumA, OutlineItem *parentA, XRef *xrefA) {
Object obj1;
refNum = refNumA;
parent = parentA;
xref = xrefA;
title = nullptr;
action = nullptr;
kids = nullptr;
obj1 = dict->lookup("Title");
if (obj1.isString()) {
const GooString *s = obj1.getString();
titleLen = TextStringToUCS4(s, &title);
} else {
titleLen = 0;
}
obj1 = dict->lookup("Dest");
if (!obj1.isNull()) {
action = LinkAction::parseDest(&obj1);
} else {
obj1 = dict->lookup("A");
if (!obj1.isNull()) {
action = LinkAction::parseAction(&obj1);
}
}
firstRef = dict->lookupNF("First").copy();
lastRef = dict->lookupNF("Last").copy();
nextRef = dict->lookupNF("Next").copy();
startsOpen = false;
obj1 = dict->lookup("Count");
if (obj1.isInt()) {
if (obj1.getInt() > 0) {
startsOpen = true;
}
}
}
OutlineItem::~OutlineItem() {
close();
if (title) {
gfree(title);
}
if (action) {
delete action;
}
}
std::vector<OutlineItem*> *OutlineItem::readItemList(OutlineItem *parent, const Object *firstItemRef, XRef *xrefA) {
auto items = new std::vector<OutlineItem*>();
char* alreadyRead = (char *)gmalloc(xrefA->getNumObjects());
memset(alreadyRead, 0, xrefA->getNumObjects());
OutlineItem *parentO = parent;
while (parentO) {
alreadyRead[parentO->refNum] = 1;
parentO = parentO->parent;
}
const Object *p = firstItemRef;
while (p->isRef() &&
(p->getRefNum() >= 0) &&
(p->getRefNum() < xrefA->getNumObjects()) &&
!alreadyRead[p->getRefNum()]) {
Object obj = p->fetch(xrefA);
if (!obj.isDict()) {
break;
}
alreadyRead[p->getRefNum()] = 1;
OutlineItem *item = new OutlineItem(obj.getDict(), p->getRefNum(), parent, xrefA);
items->push_back(item);
p = &item->nextRef;
}
gfree(alreadyRead);
if (items->empty()) {
delete items;
items = nullptr;
}
return items;
}
void OutlineItem::open() {
if (!kids) {
kids = readItemList(this, &firstRef, xref);
}
}
void OutlineItem::close() {
if (kids) {
for (auto entry : *kids) {
delete entry;
}
delete kids;
kids = nullptr;
}
}
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